CNBTR 1/2" Red Shank Carbide Steel Router Bit Set Woodworking Cutter Trimming with Wood Case Box Pack of 15 1/2" shank,sealed bearings,smooth accurate cuts Set contains a selection of popular bit profiles All heat-treated blade, with high concentricity and strong refused torsion Safety instructions: Razor blades permanently enclosed in a cartridge or housing with less than 2mm of blade exposed. The bladed product is not use for people under 18 years. The item is only use for industrial cutting/engraving, not hazardous article.